01/By surface
each with its own count, at equal weight
Hard
4-0
N. leads 4-0 in 4 meetings on hard
Clay
0-1
I. leads 1-0 in 1 meeting on clay
Grass
Never on grass
no meeting on this surface
02/Every meeting
5 rows, newest first
| Date | Tournament | Surface | Round | Winner | Score, winner first | Ranks, N. first |
|---|---|---|---|---|---|---|
| Apr 13, 2018 | U.S. Men's Clay Court ChampionshipsATP250 | clay | quarterfinal | Karlovic I. | 3-6, 6-2, 6-3 | 24 v 88 |
| Aug 18, 2017 | Western & Southern Financial Group MastersMasters 1000 | hard | 3rd round | Kyrgios N. | 4-6, 7-6, 6-3 | 23 v 44 |
| Mar 27, 2017 | Sony Ericsson OpenMasters 1000 | hard | 3rd round | Kyrgios N. | 6-4, 6-7, 7-6 | 16 v 21 |
| Oct 2, 2015 | Malaysian OpenATP250 | hard | quarterfinal | Kyrgios N. | 7-6, 7-6 | 41 v 18 |
| Jan 21, 2015 | Australian OpenGrand Slam, best of 5 | hard | 2nd round | Kyrgios N. | 7-6, 6-4, 5-7, 6-4 | 53 v 27 |
A record, never a share of meetings. Main-draw singles since 2013; a meeting ended by retirement is counted with the sets that were played and marked; a walkover is listed and counted in neither column. Kyrgios N. and Karlovic I. each carry the table against every opponent faced.